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Question

A 5.0-cm tall light bulb is placed a distance of 50 cm from a convex mirror having a focal length of 10 cm. What is the image height?


A

65 cm

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B

65 cm

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C
56 cm
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D
56 cm
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Solution

The correct option is D 56 cm
Using mirror formula,
1u + 1v = 1f
150 + 1v = 110
(u is negative and f is positive for a convex mirror)
Solving, we get:
v=506 cm

Using the formula for magnification,
m=vu = hh
50/650=h5
h=56 cm

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